Mixes, homogenizes and emulsifies a fixed volume of liquid; maintains a constant speed despite changes in sample viscosity; may introduce airborne contaminants into samples.

Prevents air induction during operation; sterile suspending, emulsifying and disagglomerating of lab samples; can be used for vacuum or pressurized shearing of high-viscosity samples.

Stepless dispersers offer homogenization and emulsification flexibility by meeting allowing a fluid speed control; users can refine the speed range in lower increments.